I need some help trying to figure out what's going on with the tyres on my Q5 TFSIe 2020. So I recently had a software upgrade at Audi to correct some electrical glitches, and they did a visual inspection which came up with the following tread measurements for my car:
Front Left - 3.7mm inner tread, 3.6 middle, 4.3 outer
Front Right - 4.5 inner, 4 middle, 4.2 outer
Rear Left - 5.3 inner, 4.8 middle, 4.9 outer
Rear Right - 5.3 inner, 5.2 middle, 5.1 outer
My mileage at this point was almost 36k miles. However, my recent service in mid October (at 32k miles) came back with these readings:
Front Left - 4.4 for all
Front Right - 4.7 for all
Rear Left - 5.5 for all
Rear Right - 5.5 for all
So my question is, is it normal that the tyres suffered such variable changes since the last service? Did Audi not bother to take the correct measurements in October, hence why they're all the same? The tyres were replaced during the rear axle recall in April '22 - the car has done around 22,000 miles since then on these new Michelin Latitude Sport 3 295/40 R20 106Y tyres.
I'm just trying to understand how this type of uneven tyre wear happens and whether there is something I should get checked, such as wheel alignment or the suspension (suspension came back fine in the visual check). Audi didn't give much help beyond this, apart from telling me that I should change the Front Right tyre immediately and offering to do it for an inflated price (no pun intended). Also, they always say that the tyre pressure is checked although it's currently reading at 33psi per tyre, when it should be 39psi as per the manual.
My knowledge of cars is pretty limited so it's left me in a bit of a confused mess! It racks up around 12k miles a year and I just want to make sure I'm keeping it safe to drive, especially with the daily school run and having the kids in the car. Any insight anyone can provide will be great, as I'm really losing faith with Audi and feel that there's something just not quite right with the info and service they're providing.